Honestly I say just buy a new one, you can get a decent one like the Corsair harpoon, or Logitech g203 for about 30 bucks US but I’d recommend Corsair m65 pro they are super durable
It’s being Defiant you need to assert your dominance by spitting on it then throwing it across the room off a wall, then it will do what you tell it to
You realise some of them have a extra button to push to lock or free spin the mouse wheel? sometimes clicking the wheel sideways enables/disables it? just a thought, i assume you woulda messed with that before pulling it apart?